The Functions scale controller may not scale the following functions correctly because some configuration values were modified in an external startup class

I get the following error in Azure when using version 1.1.0 (of Microsoft.Azure.Functions.Extensions):

```
The Functions scale controller may not scale the following functions correctly because some configuration values were modified in an external startup class.
Function 'FunctionName1' uses the modified key(s): ServiceBusConnectionString
Function 'FunctionName2' uses the modified key(s): ServiceBusConnectionString
```

This message is a warning locally, but an error on Azure that prevents the whole Function app from working.

The issue https://github.com/Azure/azure-functions-host/issues/6542 suggests that it is because on the Consumption plan the scale controller cannot access the environment variables. I have no reason to disbelieve that, but the exact same code works using version 1.0.0, so apparently using the old version the scale controller can access the environment variables.

I have not found that it is mentioned in the release notes of 1.1.0 that there is any breaking changes.